Protective Relay Engineering

PPE was built on protective relay projects and we have the knowledge, experience, personnel and partners to get the job done right. Our experienced staff can provide the following services, depending on your needs:


  • Protection scheme assessments.
  • Standard-design development.
  • As-found drawing verification or creation.
  • Demolition and construction drawing development:  1-lines, 3-lines, DC Schematics and Connections.
  • Communications overview drawing development.
  • Bill of Materials development.
  • Grounding system design and testing.

Panel Specification and Procurement

We can work with you to specify and procure all required project materials, including pre-wired relay panels and all required ancillary equipment.

Construction & Commissioning

We can perform or provide support for all protection system construction and commissioning tasks. During construction, we can provide remote or in-field support to ensure projects stay on track and on time. After construction, our engineers can develop thorough commissioning documentation and are field-trained in commissioning tasks to make ensure your new protection system functions as intended.


All of our engineers are field-trained and qualified to provide hands-on training to engineers, technicians, and operators. Fundamentals or project-specific classroom instruction is also available.

Relay and Integration Settings

We are proficient in the development of protective relay settings and integration for nearly all utility and industrial applications. We have comprehensive experience in the protection of large synchronous machines, and in the mitigation of arc-flash hazards.

Grounding System Design & Testing

PPE is able to assist with grounding system design to ensure proper operation of protective devices and minimize step and touch potential hazards to personnel in accordance with IEEE and internal standards.    In the cases where a grounding system is already in-place, we can perform testing to verify the site is in-line with internal and industry-accepted standards for earth resistivity and ground potential rise (GPR).

I really enjoy working on projects with PPE; they are the most professional group of engineers I’ve ever met.  PPE always provides a refreshing work atmosphere and the very best project planning, communication, job flow, and clear direction of anyone.  Their thorough testing practices really build confidence in the reliability of your protection, control, and annunciation systems, and they’re always on-time and under budget.  We have worked with many other contracting service companies and none have come close to PPE.  None.  I look forward to working on future retrofit projects with PPE running the show.

Scott Hurd, Technician

Certifications and Associations

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